Optimization Functions; Boost Heating; Quick Setback - Siemens RVP201 Basic Documentation

Minimum limitation of
boiler temperature
22/46
Siemens
Building Technologies
For minimum limitation of the boiler temperature, a fixed limit value of 5 °C has been
entered. The switch-on point cannot fall below the minimum limit value. In that case, the
switch-off point will be higher by the amount of the set switching differential (also refer
to "Frost protection for the boiler" in section "3.3.7 Control process").
T
K
T
Kmax
SD
T
Kmin
3.4

Optimization functions

3.4.1

Boost heating

When changing from a lower temperature level (reduced temperature or protection
mode) to the normal temperature, the room temperature setpoint is raised by 5 K, also
leading to an appropriately higher flow temperature setpoint. Also, the selected room
authority is considered when generating this setpoint.
The boost of 5 K is factory-set.
When the room temperature is only 0.25 K below the normal temperature setpoint, the
boost function will be disabled.
Boost heating can be provided only if a room temperature sensor (room unit) is used.
It is active independent of the setting of potentiometer E.
T
R
w
R
,
3.4.2

Quick setback

When changing from the normal temperature to a lower level (reduced temperature or
protection), the heating will be shut down (mixing valve closes or burner off, heating
circuit pump off), and it remains shut down until the room temperature has reached the
setpoint of the lower temperature level. Then, the heating switches on again and main-
tains the current setpoint.
Quick setback can be provided only if a room temperature sensor (room unit) is used.
This function can be deactivated with the setting potentiometer E (position Off).
Heating controllers RVP201 and RVP211
3 Technical design
SD
SD
Q
5 K
x
R
Action of switching differential at
the limit values
Q Heating load
H
SD Switching differential
T Boiler temperature
K
T Maximum limit value
Kmax
T Minimum limit value
kmin
Boost heating
T Room temperature
R
t Time
w Setpoint boost
R
w Room temperature setpoint
R
t
x Actual value of room temperature
R
CE1P2464en
2017-07-21